Water hammer in pipes Water hammer as a function of valve closing time; calculation of the wave propagation velocity in water Features - investigation of water hammer and pressure waves in pipes - 60m long pipe section - determining the wave propagation velocity in water - solenoid valve with adjustable closing time - GUNT software for displaying the pressure curve Learning objectives/experiments - water hammer as a function of flow rate - water hammer as a function of valve closing time - display pressure curve - determine reflection time - calculation of the wave propagation velocity in water Specification [1] investigation of water hammer and pressure waves in pipes [2] pipe section as coiled tube to save space [3] generation of water hammer via solenoid valve with constant closing time [4] generation of water hammer via solenoid valve with adjustable closing time [5] pressure vessel with air cushion reflects the wave [6] safety valve protects against overpressure in the system [7] instruments: pressure sensor, rotameter, manometer [8] representation of the pressure curves and the flow rate with GUNT software [9] GUNT software for data acquisition via USB under Windows 10 Technical data Solenoid valve, constant closing time - closing time: 20...30ms - operating pressure: 0...10bar Solenoid valve, adjustable closing time - closing time: 1...4s - operating pressure: 0,2...12bar Safety valve: 16bar Pipe section, copper - length: 60m - inner diameter: 10mm Pressure vessel: 4L Measuring ranges - pressure: 0...16bar - flow rate: 30...320L/h 230V, 50Hz, 1 phase 230V, 60Hz, 1 phase; 120V, 60Hz, 1 phase UL/CSA optional LxWxH: 1310x790x1500mm Weight: approx. 155kg